Safety gas-cock.



Patented Mar. 19, 1912 BERNARD DEVLIN, OF JERSEY CITY, NEW JERSEY.

SAFETY GAS-COCK.

Specification of Letters Patent.

Patented Mar. 19, 1912.

Application filed September 30, 1911. Serial No. 652,049.

To all whom it may concern:

Be it knownthat I, BERNARD DnvLIN, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Safety Gas Cocks, of whichthe following is a specificas tion. 1 A v The invention-provides a novel device for positively and automatically shutting ofi the flow of gas should the light become ext1n-- guished from any cause, thereby preventing fatalities, suchas death by asphyxiation, or loss of property by fire or explosion. In its specific construction the invention 4 provides a gas cock having unique safety appliances which are automatically operated to insure a' shutting off of .the flow of gas after the light has become extinguished from any cause whatsoever, thereby pre- .venting the escape of the gas and the attending objections incident thereto, some of which have been heretofore enumerated.

The invention consists of the novel features, details of construction and combination of parts, which hereinafter will be more particularly set forth, illustrated in the accompanying. drawing, and pointed out 1n the a pended claims.

Reiierring to the drawing, forming a part of the specification, Figure l is a side view of a gas fixture provided with a self-closing gas cock embodying 'theinvention. Fig.2 is a section on the line wm of'Fig. 1. Figs. 3, 4 and 5 are detail views, showing the different positions of the valve controlling mechanism.

Corresponding and like parts are referred.

- to in the following description, and indi- 49 cated in all-the views of the drawing, by the same reference characters.

The body of the gas cock is indicated at ljand may be of any construction and is provided with 'the usual plug valve 2 for controlling the flow of gas. The gas cook may be located at an point in the'length of the fixture and as s own is adapted to receivo-the burner and su ports a bracket 3 to wh ch is attached a ermostat' 4,'which is "su' tantially of Ujform so as to extend e burnen -and become heated by the ulting from burning the gas issuing 7 A spring 5 normally exerts a force to hold the plug valve 2 in closed position. e spring5 is of helical form and is mounted upon an end portion of the valve i 2 and has one-end connected to said valve and its opposite end secured to the body of the cock 1. jecting beyond the body of the cock receives a washer 6, which is connected thereto in a manner to rotate therewith. This washer has two stops 7 and 8 which are located at diametrically opposite points. The washer with its stops constitutes a controlling disk and is adapted to cooperate with lever 9, which is pivoted at 10 to an extension of the body 1 and has astein and oppositely disposed pallets 11 and 12 which are adapted to engage the respective stops 7 and 8,. The stem 13 of the lever has a rod 14 pivotally connected thereto, said rod being threaded throughout'its length and passing loosely through an opening formed in the free end 'of the thermostat 4. Set nuts 15 are mounted upon the threaded rod 14 upon opposite sides of the thermostat, and springs 16 are interposed between the respective set nuts and the thermostat to allow for excessive contraction or expansion of the thermostat to prevent injury or a straining of the workingparts.

lVhen the gas controlling mechanism consisting of the lever 9 and disk 6 occupy the position substantially as shown in Fig. 5,. WVhen the plugvalve 2 is turned to permit a flow of gas to the burner the parts of the controlling mechanism assume the position substantially as shown in' Fig. 3, that is with the stop 8 engaged by the pallet 12, thereby holding the valve 2 open against the tension of the closing spring 5 until the gas has been lighted and the thermostat 4 initially heated to cause expansion thereof. When the gas is burning and the thermostat heated the parts of the controlling mechanism assume the position indicated in Fig. 4, that is with the pallet 12 clear of the stop 8 and the pallet 11 in engagement with the stop 7 so as to hold the valve open against the tension of the closing spring 5. In the event of the light being extinguished from any cause the thermostat 4 cools and contracts, thereb moving cated in Fig. 5, thereby withdrawing the pallet 11 from engagement with the stop 7 when the spring 5 will come into play and close the valve 2, thereby shutting off the flow of gas.

From the foregoing description, taken in connection with the accompanying drawing,

the lever 9 into the position indi- The end of the plug valve prois shut ofi' thejpartsof the i h the advantages of the construction and of the method of operation will be readily apparentto those -skilled in the art to which the invention appertains, and While I have described the principle of operation of the I desire to have it understood that-the devlce shown is merely illustrative, and that such changes may be made when desired as are within the scope of the claims appended a plug valve rotatably mounted in the body 7' for controlling the flow of gas therethrough, a spring normally exerting a pressure upon the plug valveto hold the same in'closed H and springs mountedupon thel'threaded rod and interposed between'theiset and the.

position, a controlling disk connected with the plug valve to turn therewith and pro vided at opposite points .with' stops, a lever having pallets to engage the stops of the controlling disk,- a thermostat arranged to be heated by the flame resulting from burning the gas controlled inits flow-by the said gas cook, a threaded rod having pivotal loonnection with the lever and passing loosely through an opening of the thermostat, and

. invention, together with the device which I- now consider to be the embodiment thereof,

set nuts mounted upon "the threaded rod upon opposite sides of the thermostat.

2; A safety gas cock-comprising abody,

a plug valve rotatablymounted in the body for controlling the flowof gas therethrough, a sprin I normally exertinga pressure upon the p 35'- g' valve to hold the same t -1n closed pos1t1on, ;a controlling disk con-i nected 'with the plug valve to turn therewith- 7 and provided at o positepoints with stops, a lever havin pa lets toenga'ge the stops of the contro ling disk, a'therrnostat ar-' ranged t'o-be heated by the fia neresulting from burning the gas controlledin its flow by the said-gas'cock,-athreaded'rod having pivotal connection with -,th'e lever and passing loosely, through ahopeningofthe thermostat, set nutsmoiint'edfu izithe threaded rod .uponi'opposite'sidesb the thermostat,

therrliostat."

- In testimony in presence of two-witnesses BERNARD DEVLIN. 1' Witnesses;

.ALV H A. KNOWLE8,.. 1 W. H. SPEER.

copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patents,

-whereof I my signature 

